Create a Library check-in/check-out and book-tracking system.

• Users should be able to add books to a library
• Books should be able to have information saved about them (author, title, description)
• A user should be able to check out books from the library for one week intervals
• A user should not be able to check out more than two books at any given time
• Checked-out books should be associated with a user
• Users with overdue books should not be able to request any new books until they turn all their overdue books in
• Users should be able to check in books to the library when they're finished with them
• Users should be able to check a book's status (e.g. available, checked out, overdue or lost)
• Users should be able to see a list of who has checked out which book and when those books are due to be returned
• Users should be able to see a list of books that are overdue

• Books should have optional attributes for year-published and edition
• Users should be able to import a .csv file with a list of books to add to the library
• Users should be able to leave reviews on books with both a rating and an optional written review
• Users should be able to schedule a future check-out for a book that is currently checked-out
• Users should be able to do a one-time extension for a week if no one has scheduled a future check-out for that book